Improvement in compounds for making artificial stone



IUU- UUlIll uul IUIIV,

COATING OR PLASTIC.

\YILLLUI FEllSLl\Y, OF XI AY OllLliAXS, LOUISIANA.

IMPROVEMENT IN COMPOUNDS FOR MAKING ARTIFICIAL STONE.

Specification forming part of Letters Patent No. 143,563, dated Ocioltr 14,1 73; application liled June 23, 1ST}.

hundred part of water. It is then success ivcly placed in the mold and rammed until it is tilled. The Stone is immediately removed from the mold, exposed for twelve hours. and then placed in a hath of silicate oi soda. 1.3% specific gravifimm a and. alter dr \"in,g; for ahout twelve hours, placed in a hath of a solution of carbonate of lime in mu fiiTfic acid. 1.201 specific g1'a\'1t tor. 1 \hours. The stone is now exposed to the sun and air for two days, and is then read for use.

I claim as my invention- 1n the manufacture of artificial atone. heavy Portland cement for the outside and light T-kmerican cement for the inside, compounded and treated in themanner descrihcd.

To all whom it may concern:

Be itknown that I, \VILLLUI E. FERMJHY, of Sew Orleans. in the State oi Louisiana, have invented a certain Improved Compound for the Making: ot'Artilicial btone to he used i'oi'huilding and other purposes for which natural stone is used, and of which the following ia a full specification:

First, I take two part: of clean sharp sand and one part 01' Boulogne Portland cement which are thoroughlv lll'lXH am t ien ampened with a liquid composed of one part of sul- )llllll(' acid and four hundred parts of water. llns iorms the facing of my stone, and is placed in the mold to the thickness of about one inch. 1 next take one part of Fall (.it5 of Louisville, Kentucky, cement, and two parts of clean sharp sammavel mix the same thoroughlv, and then (Iampen with a liquid composed of one part of muriatic acid and three I 

